that superstorm. abc's meteorologist, ginger zee, is in florida, tracking what could be a once-in-a-lifetime event. >> sandy has been downgraded to a tropical storm. but that's temporary. this behemoth is forecast to become a hurricane again and join forces with a storm. multiple states are issuing emergency alerts. and today is the calm before the storm. the last day to stock up, batten down or just get out of town. >> that's what millions of people are doing, getting out. to give you a sense of what a mess this storm could make, it's expected to slam parts of the east coast with a foot of rain and several feet of snow. it's going to last for days, bringing wind damage, power outages and possibly massive flooding in some parts. abc's extreme team is covering all of the angles. we're going to start with ginger in cocoa beach, florida. good morning, ginger. >> good morning, dan. it's very windy here. we've had wind gusts of 50 miles per hour-plus. you can see the surf behind me. there was a 31-foot wav